Many Koha users have reported following error when login for post installation configuration.
Software error:
DBIx::Class::Storage::DBI::catch (): DBI Connection failed: Access denied for user ikoha_librarylvlocalhost' (using password: YES) For help, please send mail to the webmaster ([no address given]), giving this error message and the time and date of the error.
Solution
Apply the following command and start Memcached service.
sudo service memcached restart
Refresh the browser window.